Time: 09:30-11:00 05/12/2024 (Thursday)

Location: Room N406, Teaching Building, UCAS Zhong-Guan-Cun Campus 

Speaker: Anna Tokareva (Hangzhou Institute for Advanced Study, UCAS)

Abstract: 

In my talk I review how basic QFT principles connect low energy effective field theory to its UV completion through analyticity properties of non-perturbative scattering amplitudes. In particular, I discuss how causality requirement in EFT constrains the allowed parameter space, compared to positivity bounds. I address the question whether causality requirement is compatible with certain types of non-locality in a UV complete theory. I discuss constraints imposed on the EFT parameter space by different assumptions about the type of UV completion.